Switch.



E. CARPENTER SWITCH.

umoumn 2111111 MAY 9, 1907.

Patented Feb. 28, 1911.

3 SHEETSSHEET- 1.

ATTOR N EY C. E CARPENTER= SWITCH.

APPLIOATION FILED MAYB, 1907.

985,509. Patenteti Feb. 19H.

8 SEEETS -fZ-HBET 3.

\VITNESSES: INVENTOR @dM UMZ @7262 ATTORNEY .a motor,- andcontemplates'in its preferred drawings";'for the purpose of disclosingmy -the'form illustrated in f is "a'diagraminati'c-view of amodification of .lfmydevice;

35 having a core-4. The upper en is providedfwith a small] collar havinga Q proiection arranged to operate in. a slot '6, formed in a v theretoatailrod- 8,,carrying a lurality of -fidisk .z-inte m die t disk? th .zlfillsal ifi :nations operated by resistancefiout of a motor circuit, I 4

I have' illustratedifnfthe accompanying 'said drawings: Figurel is anelevation of 'oneform of my device,

bottom of the .disk and 'upon the tail rod.

. ,connected with a which-o crates in a suction or das -pot' 14, to=retard the upward. movement of the tail I'Od when the core 4; isattracted. At a point UNITED sTATasaATENT onerous 1 (1 0., 0F MILWAUKEEWISCONSIIL, WISQQ S .pSpepiflcatjon of netters at l, t: "ancationmea'iray 9,1901. sae aamss 2 Y L 2' 1 To' all ,whpm 'if ma'yconcerh: i

' Be it known that I, CHARLES E. CARPEN- fTnR, a citizenof the'UnitedStates, residing at New York city, in the county of New Yorkand State ofNew York, have invented new and .useful Improvements in Switches, ofwhich the following is a full, clear, concise,'and exact description,reference being had to the accompanying drawing, forming a part of thisspecification.

My invention relatesto improvements in switches, one of the objectsthereof being the provision of a single 'electro-responsive'. deviceforoperating a plurality of switches successively.

My inventionis particularly adapted to switches for" controllingtheresistanc'e of" and'23'. All of these contacts preferably able studs,=se'curedto' the base, and the engagement thereof, bythe various disks,changes the=position of the rollers whereby "a new surface is presented.The contact brush 15 is arranged to engage a'pair Ortontacts 24 and 25,-also mounted upon the base 2. 1 r

It will be noted that when the tail rod is .111- its normal ordownposition that the distancebetwee'n the contacts 19 and form, theprovision-of a plurality of switches tween the-contact 21 and 21 and theswitch arranged to be successively closed by meansf member 10, andthat-the'distance between the a s g olenoid, f01 cu tinga contacts 22and 23 and the switch member is greater than the distance between theswitch member and 'ts contacts, and that thedistan'ce between thebrushes and their respective contacts is" greater "than the distancebetween the switchr'n'ember 11 and its respective contacts. y thisarrangement when the t a il 'r'odis raised-by the-core ;1=,;theswitchmemb'er 9 will" engage its-contacts first,- tlie' springsupportingthe same, however, permitting; the tail rod to continue to untiltheswitcli' member 10 engages its contacts -"and sofon until the brushes*15 bridge the contacts and 25. Above the top of thejsolenoid 3is'mou-nted a switch '26 supported at 27; and arranged to engage contact28. This switch is arranged to be opened by a projection '29on the upperend of the core 4L when the-core reaches-the upward limit of its travel.Suitable bind- 4 ing posts 36,131, 32, 33, 34,35'and 36 are providedupon the face of the'base 2'by ,which the various circuit "connectionsof the switch may be made, a In the circuit. arrangement illustrated inFig. 2, the binding stSO is connectedby a conductor 37 with one terminalol the rm- "ture 38 of'the'motor 39. The opposite terminalgof thearmature 38 is connected with ib nd n'apos .31- Trh bi di g p t 32 s 'qoed ibi'aq li t r "k w ee t rr m n ret-e. an e e' ii etlt n e terinhjfield'" beingcqn e ed invention, one. embodiment thereof, and 1n Fig.2 is a diagram- 'atic View of the 'circuit' ar'rangement of F'g. 1, andFig. 3

In the embodiment of my invention illustrated in 1, upon a suitablepanel or base 2, preferably formed ofslate or other insulating material,islniounted a solenoid '3 Y i d, of the core guide plate 7 v 'JThe lowerend of the core" has secured" d 11. Eac contact is the tail rod uponspring 12 interposedbetween the a collar 13 secured Theend ofthe tailrod is' piston rod, the iston' of contacts 9, 1 0 an a, 4 p ee? ea m 3with f 6, i t P t te-ta l; b twe,

ed to'engage a pair of contacts19 and-- isarra'ngedto engagea pair ofcontacts'22 take/the form of rollers supported onsuit v and the sw tchmember 9 is less thanthe distance bellO binding post 35, which is alsoconnected with the positive side 44 of the line. The binding post -32 isconnected by conductor 45 with the contact 19, and extending between thecontacts 19 and 24 is an armature resistance 46 divided into sect-ionsand connected withthe contacts 21, 22' and 24. One terminal of thewinding of the solenoid 3 is connected by conductor 46 with thecontact28 of the switch 26. Between the switch and the contact 28 isconnected a resistance 47. The switch 26 is connected by conductor 48with the binding post 31. The opposite terminal of the winding of thesolenoid 3 is connected by conductor 49 with the binding post 33, whichis connected by a a closed .from the positive side 44 of the line,

line. solenoid 3 and the solenoid immediately atthrough conductors 4-3and 48, across switch 26, by conductor 46, through the winding of thesolenoid 3, thence by conductors 49 and 50, across switch 52, and byconductors 53 and 54 to the opposite conductor 55 of the This energizesthe winding of the tracts its core, raising the tail rod 8, and as thetail rod rises, the disk 9 bridges the contacts 19 and 20, therebyestablishing the motor circuit from the positiveside 44 of the line, byconductors 43 and-40, through the armature 38 of the motor 39, thence byconductors 37 and '56, to the contact 24', through all the resistance46, across the contact disk 9, and by conductor 54 to the oppositeside'55 of the line. The field circuit of the motor is established fromconductor 40 through the field 42, and by conductor 41, to conductor 45,thence by way of contacts 19 and 20 and conductor 54, to the.oppositeside 55 of the line. The motor thus starts with all the resistance incircuit and as the core of the solenoid continues to raise the tail rod8, the disk 10 will bridge contacts 20 and 21 to cut out oneseetion ofresistance. A continuedupward movement of the tail rod causes the disk11 to bridge contacts22 and 23 to cut out another section of resistance.and finally contact brush 15 will bridge the contacts 24 and 25, therebycutting out the last section of the resistance 46, and the motor .willbe operating at full speed. When the core 4 of the solenoid 3 reachesthe extreme upward limit of its travel, the projection 29 thereofengages the switch 26, opening the same and inserting The contacts 20,21, 23 and 25' resistance 47 in series with'the winding of the solenoid3, thereby cutting down the current to prevent over heating the. magnet,as it is well understood that the magnet requires more current to startand raise the 7 tail rod 8, than it does to maintain the same inits-raised position. v

In a lifting solenoid of the construction shown, having a fixed numberof'amp'ere turns in the winding thereof, the pull on the 7 plunger wouldincrease as the plunger rises and the magnetic gap 15 closed, and truewould tend to increase the speed of'the rise of the plunger rod againstthe action of the dash-pot.

This difference in pull, however, 30 in the present device iscompensated for by the springs on which the various contacts of the tailrod rest, and which as the contacts are successively closed increase theresist-, ance to pull on-the plunger. l In Fig. 3 I have shown amodification of my device wherein -I have dispensed with the dash-potfor regulating the 'upward movement of the core of the solenoid, and inplace thereof, I have provided a means for regulating the movement ofthe core of the solenoid, through the action of the winding of thesolenoid. This means is illustrated as a second winding connected acrossthe armature terminals. In this structure the upper winding 5" of thesolenoid 3 serves to raise the tail rod to a starting position,

and the lower winding 58 which is connected across the armatureterminals, by conductors 59 and 60, serves, as the counterelectroemotive force of" the armature increases,

to raise the tail rod to successively close theswitches, In operationwhen the 'switch 52 is closed. circuit will be established from] thepositive side 61 of the line, by conductors 62 and 60, across the switch52, by conductor 63, across the switch 26, bv conductor 64, through thewinding 57 of the solenoid, and thence by conductor 65, to the oppositeside 66 of the line. thus being energized, raises the core 4 of thesolenoid to its initial position, and the disk 9 bridges the contacts 19and 20, -there-- by establishing the armature circuit from conductor 62,through the armature 67, by conductor 68, through resistance 46, acrossthe disk 9, and b conductor 65. to the op posite side 66 of the line.The field circuit is established at the same time from the conductor 62,through the field 69, and thence by conductor 70, across the contact 19.and by conductor 65 to the opposite side 66 of the line. The armaturethus starts with all resistance in circuit and the wind-- ing 58 isenergized by the circuit across the armature terminals extending fromone terminal of the armature, byconductor 60, across the switch 52, byconductor, 71, through the winding 58 of the soicnoid 3,

and thence by conductor 59,'to the opposite The winding 57 terminal ofthe armature 67. As the coun- {ti a eleet etire to ce qttheearmatu eiinaiyblifl estri fls'sliffi gi B ,SQlQ ,lQl-d :35,

. increased by the windin 5 8, ;-,*tlie 5 iswitches llli li a d .:ai1.mas ely 15 motor acelerates- In this case also, how- -ever, the springsof the contacts on the tail rod offer an increasing resistance, therebymaking the speed at which the plunger of the solenoid rises the sameunder-all, conditions.

While in Fig.3 I have shown two independent windings, one; placed uponthe other, it is obvious that one winding maybe superimposed upon the:other or one sole-' noid spool may be telescoped upon the other,

and ina certain class of work this construction is preferred. It will befurther under-. stood that I do not-wish to be limited to the preciseconstruction scribed, but may make various changes therein. Forinstance, instead of arranging .the coils'to'ass'ist-one another, Imayarran e the same to cooperate in other ways.

aving thus. described my invention what Iclaim as new and desire tosecure by Letters Patent is:

1. In a controller for electric motors, the combination with anelectro-responsive 'de-.,

vice, aimember movable thereby, a plurality- 40 of. switch membersresiliently mounted on. said member,- a plurality of contacts sopositioiied 'a'sto be successively bridged-by the switch members uponthe movement of the memberf by the electro-responsive device,and'resistances'connected to certain of said jfcontact s to-beshort-circuited by said switch members. v I

2. In'aimotor; controller, the combination with a. .movablef hoperating" winding therefon-a plurality of switches resiliently mountedon said movable memher, a plurality ofcontacts arranged to besuccessively-engaged by said switches, a re-; sistance connected to'cert-am of said -con-.-

' springs interposed between said SWltCll memtacts whereby saidresistance will be shortcircuited .as the contacts are engaged by -said-switches, and means for controlling "the movement of the movablemember.

3. The combination with a solenoid, a longitudinallymovable coretherefor, a plu- -ralrit v of switch member's resiliently mountedthereon, a plurality of stationary contacts arranged in' pairs,resistances connected to said stationary contacts, the distance .betweeneach pair of stationary contacts and illustrated and dewith aresistance, of an electro-responsive their respective switch memberbeing inc a d awa h b t m i s i tcpn hth between the switch meziib'iisb' seeasi l mistr es 1 t e Isa ah; has m r ts dqw a i ed iijdall wiefirth rod. to continu'e to theilgist r r.,-) mi vmovable core,tlieretor, an extens on on said core, collars on-said.-Xtension,,-aplurality 7 of disk contacts loosely mountedjon said extension, springsinterposed between each disk and the collar next below it, a laminatedcontact secured to the lower end of said extension, and a pluralityotstationary contacts arranged in-pa-irs and having resistancesconnected thereto, said contacts being arranged to be bridgedsuccessively.

A motor controller comprising a solenoid, a movable core therefor, anextensidn on said core, collars on said extension,a plurality of switchmembers loosely mounted on said extension, springs interposed betweeneach switch member and the collar next below it,

a plurality of stationary contactsarranged in pairs, resistancesconnected to said contacts, the distance between the contacts and theirswitch members increasing toward the 'bottom of the extension, wherebywhen the core is raised the pairs of contacts will-be successivelyengaged and the resistances removed from the motor circuit step by step.6. The combination'wit-h a solenoid, of a movable core therefor, aplurality of collars, on said core, loosely mounted on saidcore,-springs, interposed betWeen-eachswitch. member and the collar nextbelow it, a plurality of station: ary contacts'arranged in pairs andhaving. resistances connected thereto, said -contacts being adapted tobe successively engaged by the switch members, the'sprin'gs beingadaptedto yield as the switch members engage their respective contacts toallowthe core to move to final position to bring the last switch memberin engagement with-its pair of stationary contactsL V 7. ,In a motorcontroller,thecombination with solenoid winding ada'ptedto be connectedacross the circuit, and a winding adapted to beeconnected across thearmature terminals, of a longitudinally movable core for said windings,a'- plurality of switch members loosely mounted on said core,.

sive1y' engagedi p i e allowing the core to move through the switchmembers until the last'conta'cts are bridged.

'8' In a motor controller, the combination a plurality of switch memberswinding, a longitudinally movable plunger therein, a pluralit of contactdisks loosely "mounted on-the unger,- springs surroundving the plunger etween said d1sks,va laminated brush contact at the bottom of said fpung'er, a plurality ofcon tacts arranged in 10 toward t airs andconnected to said resistance, the distance between each pair of contactsand their res ective bridging contact increasing he bottom of theplunger, whereby the contacts will be engaged successively, and means tocontrol the movement of said plunger.

In witness whereof, I have hereunto subscribed my name'in the presenceof two wit- 15 nesses.

CHARLES E. CARPENTER.

\Vitnesses V I c A. J. HORTON, ROBERT LEWIS Anus.

